Sound signal processing device, method, and program

A sound signal processing and sound signal technology, applied in the field of sound signal processing devices, can solve problems such as discontinuity, undetectable fragments of interfering sound, and easy occurrence of musical noise

Inactive Publication Date: 2012-10-24
SONY CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

On the other hand, it has the problem that it includes the occurrence of discontinuities in the frequency spectrum, so it is prone to musical noise when reverting to the waveform
[0109] 1) The direction of the target sound may not be accurate in some cases (including errors)
[0110] 2) Fragments of interfering sounds may not normally be detected
[0150] This scheme suffers from inaccurate orientation, but is somewhat unaffected by

Method used

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  • Sound signal processing device, method, and program
  • Sound signal processing device, method, and program
  • Sound signal processing device, method, and program

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Embodiment Construction

[0212] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that, in this specification and the appended drawings, structural elements that have substantially the same function and structure are denoted with the same reference numerals, and repeated explanation of these structural elements is omitted.

[0213] The sound signal processing apparatus, method and program will be described in detail below with reference to the accompanying drawings. In this specification, there may be such situations: Figure 17A , Figure 17B etc. are represented as Fig. 17a, Fig. 17b, etc., respectively.

[0214] The processing will be described in detail as follows.

[0215] 1. Overview of the structure and processing of the sound signal processing device

[0216] 1-1. Structure and overall processing of the sound signal processing device

[0217] 1-2. Sound source extraction processing using ...

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Abstract

There is provided a sound signal processing device, in which an observation signal analysis unit receives multi-channels of sound-signals acquired by a sound-signal input unit and estimates a sound direction and a sound segment of a target sound to be extracted and a sound source extraction unit receives the sound direction and the sound segment of the target sound and extracts a sound-signal of the target sound. By applying short-time Fourier transform to the incoming multi-channel sound-signals this device generates an observation signal in the time-frequency domain and detects the sound direction and the sound segment of the target sound. Further, based on the sound direction and the sound segment of the target sound, this device generates a reference signal corresponding to a time envelope indicating changes of the target's sound volume in the time direction, and extracts the signal of the target sound, utilizing the reference signal.

Description

Background technique [0001] The invention relates to a sound signal processing device, method and program. More specifically, the present invention relates to a sound signal processing device, method and program for performing sound source extraction processing. [0002] The sound source extraction process is used to extract a target source signal from multiple signals to be observed (where multiple source signals are mixed, hereinafter referred to as "observed signal" or "mixed signal") using one or more microphones. Hereinafter, the target source signal (that is, the signal desired to be extracted) is called "target sound" and the other source signals are called "interfering sound". [0003] One of the problems to be solved by the sound signal processing apparatus is to accurately extract the target sound if the sound source direction and the section of the target sound are known to some extent in an environment where a plurality of sound sources exist. [0004] In other w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L19/00G10L21/028G10L21/0308
CPCG10L19/00G10L21/0216G10L2021/02166
Inventor 广江厚夫
Owner SONY CORP
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